1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '3767a6b3244ff54aa91de4630631779d', '3.17.150.89', '1714021179', '1714021179', '/product_info.php/info/p22_Alge-im-Honig.html')

[XT SQL Error]